Tìm x

( -1/2 ) ^x = ( - 1/8 ) ^3
( - 3 ) ^x / 81 = - 27
( 3x ) ^3 = ( 1 - 2x ) ^3
2 ^ 4-x / 16 ^5 = 1
2 ^2x + 1 + 4^ x+3 = 264